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Much progress has been achieved in the age-dating of old stellar systems, andeven of individual stars in the field, in the more than sixty years since theevolution of low-mass stars was first correctly described. In this paper, Iprovide an overview of some of the main methods that have been used in thiscontext, and discuss some of the issues that still affect the determination ofaccurate ages for the oldest stars.

The ages of (the oldest) stars